Exploració per autor "Roa Rovira, Joan Josep"
Ara es mostren els items 98-117 de 185
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Laser surface modification for enhancing mechanical properties of metastable stainless steel 301LN
Rezayat, Mohammad; Ramos, F.; Roa Rovira, Joan Josep; Mateo García, Antonio Manuel (Universitat Politècnica de Catalunya, 2022-06-16)
Comunicació de congrés
Accés obert -
Laser-assisted surface modification of zirconia-based materials to guide osteoblast responses for dental applications
García de Albéniz López de Aberasturi, Nerea; Roa Rovira, Joan Josep; Mas Moruno, Carlos (Sociedad Española de Materiales, 2022-04-05)
Article
Accés obertThe project is aimed at investigating the effect of laser surface modification of dental-grade zirconia (3Y-TZP) to guide cellular behaviour. A nanosecond laser was employed to fabricate groove patterns on the surface of ... -
Low Sr doping effects on critical current density and pinning mechanism of YBa2Cu3O7-x single crystals
Lopes, R.F.; Vieira, Valdemar das Neves; Teixeira Dias, Fábio; Silva, D.L.da; Pureur, P; Schaf, J; Roa Rovira, Joan Josep (Institute of Physics (IOP), 2014)
Article
Accés obertWe report on isotherm dc magnetization hysteresis loops, M(H) to 70K ¿ T ¿ 82.5K of YBa2-xSrxCu3O7-x (x = 0, 0.02 and 0.1) single crystals with the purpose to study the influence of the low Sr doping effects on the YBa2Cu3O7-¿ ... -
Magnetical response and mechanical properties of second generation of HTSC, YBCO materials
Roa Rovira, Joan Josep; Dias, F.T.; Segarra, M. (InTech — Open Access Company, 2012-05-15)
Capítol de llibre
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Manufacturing of anode-supported tubular SOFCs by a new shaping technique using aqueous gel-casting
Navarro, M E; Capdevila, X. G.; Morales, Miguel; Roa Rovira, Joan Josep; Segarra, M. (2011-02-15)
Article
Accés restringit per política de l'editorialA new gel-casting technique has been successfully developed to obtain tubular NiO–SDC anode-supported solid oxide fuel cells (SOFCs). Rheological parameters of the ceramic particle suspensions, directly influencing on ... -
Mapping of mechanical properties at microstructural length scale in WC-Co cemented carbides: Assessment of hardness and elastic modulus by means of high speed massive nanoindentation and statistical analysis
Roa Rovira, Joan Josep; Phani, P. Sudharshan; Oliver, Warren C.; Llanes Pitarch, Luis Miguel (2018-09-01)
Article
Accés obertThis paper studies the correlation between the microstructure and the mechanical properties at the nanometric length scale of individual WC grains as well as the metallic cobalt binder in cemented carbide systems. The ... -
Measuring the fracture toughness of single WC grains of cemented carbides by means of microcantilever bending and micropillar splitting
Ortiz Membrado, Laia; Cuadrado Lafoz, Nuria; Casellas Padró, Daniel; Roa Rovira, Joan Josep; Llanes Pitarch, Luis Miguel; Jiménez Piqué, Emilio (2021-08-01)
Article
Accés obertThe main goal of this work is to obtain a reliable value of the fracture toughness of single grains of tungsten carbide (WC). It is attempted by testing microcantilever and micropillar samples shaped out, by means of focused ... -
Mechanical characterization at nanometric scale for heterogeneous graphite-salt phase change materials with a statistical approach
Canseco, Vladimir; Roa Rovira, Joan Josep; Rayón, Emilio; Fernández Renna, Ana Inés; Palomo, Elena (2012-01-04)
Article
Accés restringit per política de l'editorialA statistical indentation analysis of a series of phase change graphite–salt composite materials for latent heat thermal energy storage applications was investigated using instrumented indentation technique with the aim ... -
Mechanical characterization at nanometric scale of a new design of SOFC
Roa Rovira, Joan Josep; Ruíz-Morales, J.C.; Canales-Vázquez, Jesús; Morales, Miguel; Capdevila, X.G.; Núñez, Pedro; Segarra, M. (2011-02-09)
Article
Accés restringit per política de l'editorialThe mechanical stability is an important parameter to gain knowledge in the potential applications of a novel design of electrolyte-supported SOFC, based on yttria-stabilised zirconia (YSZ) and NiO-YSZ composites, with ... -
Mechanical characterization at nanometric scale of ceramic superconductor composites
Roa Rovira, Joan Josep; Capdevila, X.G.; Segarra, M. (NovasScience Publishers, 2009)
Capítol de llibre
Accés restringit per política de l'editorial -
Mechanical characterization at nanometric scale of ceramic superconductor composites I
Roa Rovira, Joan Josep; Capdevila, X.G.; Segarra, M. (NovasScience Publishers, 2009)
Capítol de llibre
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Mechanical deformation of WC-Co composite micropillars under uniaxial compression
Tarragó Cifre, Jose María; Roa Rovira, Joan Josep; Jiménez Piqué, Emilio; Keown, Eugene; Fair, Jonathan; Llanes Pitarch, Luis Miguel (2016-07-27)
Article
Accés obertIn this work, WC–Co micropillars machined by focused ion beam have been tested under uniaxial compression to investigate the stress–strain behavior and associated deformation mechanisms. The results indicate that yielding ... -
Mechanical deformation of WC–Co composite micropillars under uniaxial compression
Tarragó Cifre, Jose María; Roa Rovira, Joan Josep; Jiménez Piqué, Emilio; Keown, Eugene; Fair, Jonathan; Llanes Pitarch, Luis Miguel (2015-07-17)
Article
Accés obertIn thiswork,WC–Co micropillars machined by focused ion beamhave been tested under uniaxial compression to investigate the stress–strain behavior and associated deformation mechanisms. The results indicate that yielding ... -
Mechanical integrity of PVD TiAlN-coated PcBN: Influence of substrate bias voltage and microstructural assemblage
Gordon Pozuelo, Sandra; Rodriguez Suarez, Teresa; Roa Rovira, Joan Josep; M'Saoubi, Rachid; Andersson, J. M.; Jiménez Piqué, Emilio; Llanes Pitarch, Luis Miguel (Elsevier, 2023-12)
Article
Accés obertPolycrystalline cubic boron nitrides (PcBN) have been increasingly used together with PVD coatings, mainly for hard turning operations. Within this context, effectiveness of coated PcBN as cutting tool is usually addressed ... -
Mechanical properties at nanometric scale of alumina layers formed in sulphuric acid anodizing under burning conditions
Roa Rovira, Joan Josep; Gascon-Garcia, B; Garcia-Lecina, E.; Muller, C (2011-03-23)
Article
Accés restringit per política de l'editorialA mechanical study (hardness, H and Young's modulus, E) at nanometric scale of the distribution of mechanical properties across the surface of porous anodic alumina (PAA) films formed during aluminium anodizing in sulphuric ... -
Mechanical properties at the nanometric scale of GDC and YSZ used as electrolytes for solid oxide fuel cells
Morales, Miguel; Roa Rovira, Joan Josep; Capdevila, X.G.; Segarra, M.; Piñol, Salvador (2011-02-09)
Article
Accés restringit per política de l'editorialThe Young’s modulus (E), hardness (H) and fracture toughness (KIC) of various compositions of gadolinia doped-ceria (GDC, GdxCe1−xO2−x/2, 0.1 ⩽ x ⩽ 0.2) and yttria-stabilized zirconia (YSZ, Y0.08Zr0.92O1.96) electrolytes ... -
Mechanical properties of 12Ce-ZrO2/3Y-ZrO2 composites
Turón Viñas, Miquel; Roa Rovira, Joan Josep; García Marro, Fernando; Anglada Gomila, Marcos Juan (2015-12-01)
Article
Accés obert12Ce-ZrO2/3Y-ZrO2 composites with different compositions have been prepared by presureless sintering at 1450 degrees C and the resulting microstructures have been correlated with their mechanical properties in terms of ... -
Mechanical properties of 3D-printing polylactic acid parts subjected to bending stress and fatigue testing
Travieso Rodríguez, José Antonio; Jerez Mesa, Ramón; Llumà Fuentes, Jordi; Traver Ramos, Oriol; Gómez Gras, Giovanni; Roa Rovira, Joan Josep (Multidisciplinary Digital Publishing Institute (MDPI), 2019-11-22)
Article
Accés obertThis paper aims to analyse the mechanical properties response of polylactic acid (PLA) parts manufactured through fused filament fabrication. The influence of six manufacturing factors (layer height, filament width, fill ... -
Mechanical properties of Al2O3 inverse opals by means of nanoindentation
Roa Rovira, Joan Josep; Coll Valentí, Arnau; Bermejo, Sandra; Jiménez Piqué, Emilio; Alcubilla González, Ramón; Castañer Muñoz, Luis María; Llanes Pitarch, Luis Miguel (2016)
Article
Accés obertIn order to understand the mechanical behaviour of Al2O3 inverse opals, nanoindentation techniques have been implemented in material layers with three different microstructures, in terms of hollow or polystyrene spheres, ... -
Mechanical properties of highly textured porous Ni-YSZ and Co-YSZ cermets produced from directionally solidified eutectics
Roa Rovira, Joan Josep; Laguna, M. A.; Larrea, A.; Orera, V. M.; Segarra, M. (2011-12-20)
Article
Accés restringit per política de l'editorialIt is well known that several ceramic materials develop an usual; and sometimes unique; combination of properties as a result of mixing different phases with similar expansion coefficients. Sometimes they are elastically ...